2.6.32-stable review patch. If anyone has any objections, please let us know.

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From: Tejun Heo <tj@kernel.org>

commit c6353b4520788e34098bbf61c73fb9618ca7fdd6 upstream.

For yet unknown reason, MCP89 on MBP 7,1 doesn't work w/ ahci underlinux but the controller doesn't require explicit mode setting andworks fine with ata_generic. Make ahci ignore the controller on MBP7,1 and let ata_generic take it for now.